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View this topic on docs.devexpress.com (Learn more)

ChartControl.CustomDrawAxisLabel Event

Occurs before axis label items are drawn when the chart's contents are being drawn.

Namespace:DevExpress.XtraCharts
Assembly:DevExpress.XtraCharts.v19.2.UI.dll

Expanded Syntax

Expanded Event Data

The event handler receives an argument of type CustomDrawAxisLabelEventArgs containing data related to this event.

Expanded Remarks

Use the CustomDrawAxisLabel event, to individually adjust the appearance of Axis Labels, e.g. based on their axis values.

The CustomDrawAxisLabel event is raised before every DevExpress.XtraCharts.AxisLabelItem object is painted. The event parameter's DevExpress.XtraCharts.CustomDrawAxisLabelEventArgs.Item property provides an DevExpress.XtraCharts.AxisLabelItem object, which represents an individual axis label item. So, for an axis label item obtained in the CustomDrawAxisLabel event, it's possible to obtain its axis value (or internal value, if it's needed), its font and appearance settings, and also access the properties of the associated axis itself.

Note that in order to access settings specific for 3D charts axis labels, the return value of the DevExpress.XtraCharts.CustomDrawAxisLabelEventArgs.Item property should be typecast to the corresponding type (DevExpress.XtraCharts.AxisLabel3DItem). And, for Radar and Polar charts only the X-axis labels are available, and can be obtained and customized in this event.

For more information, refer to Axis Labels.

Expanded Example

Apart from the capability to customize the overall appearance of Axis Labels, you can obtain individual axis labels at runtime. Then, it's possible to apply all the options available for axis labels to them, individually. For example, based on some criteria (e.g. an axis value threshold), you can apply different formatting to axis labels.

For this, the special CustomDrawAxisLabel event is introduced. Handle it to obtain axis labels.

Note

For the DevExpress.XtraCharts.Web.WebChartControl you should handle its DevExpress.XtraCharts.Web.WebChartControl.CustomDrawSeries event to implement this task.

The following code demonstrates one possible implementation of this capability.

Expanded See Also

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